Paul ferret



' (No Model.)

P. FERRET.

WATCH PENDANT.

No. 402,478. Patented Apr. 30, 1889.

N PITKRS. HON-Wright. WW E C,

UNITED STATES PATENT OFFICE.

PAUL FERRET, OF CHAUX-DE-FONDS, SVITZERLAND.

WATCH-PENDANT.

SPECIFICATION forming part of Letters Patent No. 402,473, dated April30, 1889. Application filedNovemher 12, 1888. Serial No. 290,544. (Nomodel.)

To aZZ 1071,0722 it 710(LZ/(30Tb067'7b:

Be it known. that I, PAUL FERRET, watch manufacturer, of OhauX-de-Fonds,in Swit zerland, have invented an Improvement in Stenrlvinding Crownsfor IVatches, of which the following is a specification.

The object of this invention is to secure the winding-stem and the crowntogether in a more reliable manner than heretofore, and to allow for theeasy withdrawal of the stem when the movement is to be taken out of thecase.

In the drawings, Figure 1 is a vertical sec tion of the crown and aportion of the stem and of the securing device. Fig. 2 is asimilar viewof the parts as adapted to a watch with a hunting-case. Fig. 3 is aslight modification of the devices shown in Fig. 2. Figs. i and 5 aresections illustrating the manner in which the parts are secured withinthe pendant, and Fig 6 is an elevation of the pendant.

The stem A is provided with a socket, A, at one end, which is adapted toreceive the square upon the winding-stein in the watchworks. These partsare of usual character, except that the stem A is secured to the crown Bin the manner hereinafterdescribed. This crown B is recessed at itslowerend to receive the upper end of the pendant, Fig. 6, as is usualin. watches; but in order to secure the stem A to the crown B, I reducethe stem in diameter, as shown, so as to pass the same through a centralhole in the crown B, and this reduced portion of the stem may be square,as indicated in Fig. it. 'Under all circumstances there is a shoulderupon the stem A, with which the lower end of the crown B comes intocontact, and there is a nut, C, screwed upon the reduced andscrew-tln'eaded upper end of the said stem A, and this nut is recessedinto the upper end of the crown B. Upon reference to Fig. 1 it will beseen that this nut t, after being screwed up tightly, is held inposition and. kept from turning by the screws 0, passing through the nutC into the crown B, so that the crown can be sepa rated from the stem Aby removing the screws 0 and unscrewing the nut O. This is the mainfeature of my im n-ovement, and will be found in all of the formsrepresented In Fig. the befo'redescribed i1n1nrovements are represented;but in addition there is a cannon, D, surrounding the stem A between thesocket A and the crown B, and this cannon has a flange at its lower end,as usual, to act upon the spring of the huntingcase when the stem Areceives an endwise motion, and to allow of this endwise motion the nutC does not in its normal position touch the bottom of the recesses inthe crown B, but the screws 0, that prevent the nut C turning, arecontinued as rods of reduced size, that pass through holes in the headZ) and rest against the upper edge of the cannon D, thereby allowingthese screws 0 to press directly upon the cannon D and give motion tothe same when the thumb is applied to the nut (3 for opening the case.

In Fig. 3 the devices correspond to those shown in Fig. 2, with theexception that a secondary nut is provided upon the end of the stem A,and the rod Z), connected with the nut O and resting against the upperedge of the cannon D, takes the place of the rods that formcontinuat-ions of the screws 0, Fig. 2, and, as represented in Fig. 3,the end of the cannon D is sufiiciently large to slip over the socket A,and there is a helical spring, a, in the recess that serves to returnthe parts to their normal position.

In Figs. a and 5 the mode of connecting the before-described cannon andstem to the pondant is .illustrated. The collar R around the stem Aintervenes between the socket A and the lower end of the crown B, andinto this collar R the screws 11 pass, the heads being in holes withinthe pendant of the watch, as illustrated in Fig. 5, and in these twofigures I have also represented springs between the nut O and the crownB. In Fig. i the spring a is helical, and in Fig. 5 the spring a iselliptical or dish-shaped. In both these iigures the nut (l is held fromturning by the screws that pass through the same into the crown, and tooperate the spring of the hunting-watch case the nut U is to be pressedendwise of the pendant to give motion to the stem A and the parts uponwhich it operates, but the stem is free to be rotated by revolving thecrown B.

In Fig. 6 the exterior of the pendant is represented, and the holethrough which one of the screws 1. passes is formed as a bayonetslot,

so as to allow the parts to be disconnected without unscrewing the screwo. I claim as my inVention- 1. The combination, with the crown B and 5the winding-stem A, passing through the said crown, of the nut O,screwed upon the end of the stem, and the small screws 0, for preventingthe nut becoming unscrewed, substantially as set forth.

1o 2. The crown B, having a central hole and recessed for the end of thependant, in combination with the stem A, having a socket, A, at one end,the nut C, screwed upon the other end of the stem and occupying a recessin the crown, the screws a, passing through 15 the nut into the crown,and a spring between the nut and the crown, substantially as set forth.

In testimony whereof I have signed my name to this specification in thepresence of two sub- 20 scribing witnesses.

PAUL FERRET. -Witnesses:

NUMA FERRET, ALBERT FAVRE.

